2pcs GB21011-207 Threading
- Threading
- High Speed Steel
- 6.7 ounces
- More reviewed than 68%
A focused threading tool for one specific metric size, worth it only if M18x1.5 threads are the job at hand.
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How it ranks among the 71 threadings we track
4.4★ across 351 Amazon ratings, Bayesian-smoothed toward the category average.
351 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
200+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 71 threadings we track - how the scorecard works · full threadings data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
This is a two-piece high speed steel threading set cut to the M18x1.5 metric standard, the kind of tool used to cut or repair external and internal threads on a bolt or hole of that size.
GB21011 references the Chinese national standard for taps and dies, and pairing two pieces at the same M18x1.5 spec typically means a tap for internal threads and a die for external threads, or a matched pair for cleaning up damaged threads on both a bolt and its mating hole. High speed steel holds an edge through repeated cuts better than carbon steel.
- M18x1.5 metric thread size
- High speed steel construction
- 2 piece matched set
- 6.7 ounce weight
Who it's for
Machinists, mechanics, or DIY repairers who need to cut or restore M18x1.5 threads. Not useful for any other thread size since this set is cut to one spec.
Strengths and trade-offs
Drawn from this product's published specifications.
- High speed steel holds an edge through repeated cuts
- Matched two-piece set for one thread spec
- Light at 6.7 ounces for handling
- Only usable for M18x1.5 threads
- No handle or wrench included based on listed specs
Performance notes
High speed steel construction keeps the cutting edges sharp through repeated passes, which matters when chasing or cutting threads in harder metals.
Specifications
| Brand | 2pcs |
|---|---|
| Model | GB21011-207 |
| Material | High Speed Steel |
| Item Weight | 6.7 ounces |
Other 2pcs threadings
How it compares
This product against the closest alternatives we track in threadings.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| 2pcs GB21011-207 ThreadingThis product | 4.4 / 5 | 351 | 3.9 / 5 |
| Drill DWTPT3/4 ThreadingDrill | 4.7 / 5 | 3,400 | 4.4 / 5 |
| GEARWRENCH 82812 ThreadingGEARWRENCH | 4.6 / 5 | 2,363 | 4.3 / 5 |
| Orion TAD-SM80-N0 ThreadingOrion | 4.4 / 5 | 2,108 | 4.2 / 5 |
| Klein 62524 ThreadingKLEIN | 4.7 / 5 | 1,102 | 4.2 / 5 |
Similar threadings from other brands
Questions about the 2pcs GB21011-207
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What thread size does this set cut?
M18x1.5, a metric thread size and pitch.
What is the set made of?
High speed steel, which holds a cutting edge through repeated use.
How many pieces come in this set?
Two, matched to the same M18x1.5 spec.